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From Jean-Daniel Cryans <jdcry...@apache.org>
Subject Re: Monitoring HBase counters while running tests
Date Wed, 03 Aug 2011 22:26:01 GMT
Hi Thomas,

No specific guide for monitoring performance but I strongly recommend
that you read the following sections of the book:

http://hbase.apache.org/book/performance.html
http://hbase.apache.org/book/trouble.html

And regarding general advices, lookout for swap and high iowait,
verify that you don't max out your network (but also make sure it runs
a decent speeds, same for the disks), if you do a lot of random reads
look for the efficiency of the block cache (it has a few metrics),
and... that's all I can think of right now.

Good luck,

J-D

On Wed, Aug 3, 2011 at 1:08 AM, Steinmaurer Thomas
<Thomas.Steinmaurer@scch.at> wrote:
> Hello,
>
>
>
> we are in process running our first load test on a Cloudera test cluster
> with 8 region servers. We also have Ganglia in use for monitoring. I
> wonder what counters one should watch out during the tests to identify
> possible bottlenecks, improvements etc ... Is there some kind of quick
> start guide into Hbase specific measures?
>
>
>
> Thanks!
>
>
>
> Thomas
>
>
>
>

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